Amplifying apparatus



Filed Jan. 16, 1932 FIG.1

l0 ll 0 0 lNVEhiTOR F|G.2 R/chard M. Jamar;

BYE Z Patented Oct. 31 1933 AMPLIFYING APPARATUS Richard M. Somers,Orange, N. .lL, assignor to Thomas A. Edison, Incorporated, West Orange,N. J., a corporation of New Jersey Application January 16, 1932. SerialNo. 587,120

3 Claims.

ampliner chassi if apparatus invention to providean which shall be neatand comand in whichv may wor hng parts of he and test the some. It isfurther this invention to provide an 2.1T l' in which of the to get outof the panel, whereas to get out of order is side of the panel, and inis concentrated on one side apparatus w to prothe class described whichwill d advantages of my in- M" be rent from the specification. s noveltywhich I believe to be c of my inv ntion are forth with ity in theappended claims. My in- 11 itself, however, both as to its funds- .1principles asto its particular emoe best understood by referencelC-fiEiGll and accompanying draw ng,

L 1 to" an. View of an ampliner according to my invention,

Fig. 1 is end elevation thereof, partly in section, and

3 is a side elevation looking toward the right in 2.

The structural foundation of the chassis according to my 1* ention isprovided by the panel 1, which is preferably rectangular and ofconsiderably greater heig than width. panel 1. provided with 2 on'thesides thereof which serve the purpose of reinforcing and strengtheningit. v

Mounted on the panel 1 on the side opposite the flanges I provide thevarious elements of the amplifying system which. are least likely to outoi order, such, for instance, as the transformers, the power supplyfilters, chokes and The shown in the drawing.

the like, and in general all of the bulky apparatus designatedgenerallyby the numeral 4 in the drawing; All of this apparatus is pro- Videdwith terminal lugs on the side which is fitted against the panel 1 andthe panel 1 is provided with appropriate openings'l and 15 et cetera,through which the terminal lugs on the apparatus project. Mounted uponthe panel 1 on the side opposite the transformer and assocted apparatus4 I provide a plurality of tube shelves 7, 8 and 9. These tube shelvesmaybe in the form or" metal plates having down turned flanges similar inconstruction to the construction of panel 1 with flanges 2, and thesecured against the panel 1 in such manner that they projecthorizontally therefrom and are arranged one above the other. The tubesockets such as 10 and 11 are mounted on the shelves '7, 8 and 9 in sucha way that the tubes stand with their axes vertically upon the shelves7, 8 and 9.

Connections are made fromthe tube sockets to the terminals of thevarious circuit devices mounted on the panel 1 and additionalconnections may be made between the terminals themselves. Only a few ofsuch connections are It is understood that these connections may merelyconsist of wires such as connections 18 and 18 and/or they may includeresistors 16, 19 and 19 and/or condensers 20 and 20. The resistors 16,19 and 19', condensers 2G and 20', and other miscellaneous apparatussuch as the fuse block 1"],are preferably mounted upon the shelf side ofpanel 1, as shown.

The wiring from the tube sockets is preferably maintained entirelyWithin the flanges on the shelves 7, 8 and 9 so that cover plates may beplaced upon the bottom of these shelves to enclose the wiring, andpreferably an additional cover plate provided with openings forpermitting its passage over tube shelves '7, 8 and 9 is also providedwhich encloses and protects the wiring on the shelf side of the panel 1.Thus it will be seen that in making inspection or test, it is onlynecessary to remove the cover plates, whereupon the entire amplifier andall its apparatus is available for test from the shelf side of thepanel 1. Preferably the chassis is installed in a cabinet with theapparatus 4 toward the rear of the cabinet and the shelf side of thepanel 1 toward the door of the cabinet,

from which it will be seen that when the door is closed no apparatus canbe seen. When the door is open the only apparatus which is seen consistsof the tube shelves 7, 8 and 9 with the tubes mounted thereon. However,if it is desired to check the amplifier circuit it is only necessary toremove the tubes from their sockets and to remove the cover plates,whereupon all of the apparatus is available for test, including theapparatus 4 on the opposite side of the panel.

While I have shown and described certain preferred embodiments of myinvention, it will be apparent that modifications and changes may bemade without departing from the spirit and scope, of my invention, aswill be understood by those skilled in the art.

I claim:

1. In an amplifier, in combination, a vertical panel having flanges onone side, a plurality of circuit devices mounted on the unflanged sideof said panel, said devices being connected with terminals projectingthrough said panel, a plurality oi? tube shelves secured to the flangedside 0! said panel and extending horizontally there- 1mm. 881d shelveshaving tube sockets, and connections between said tube sockets and saidterminals, said connections all being on the flanged side of said paneland within said flanges.

3. In an amplifier, in combination, a vertical panel having flanges onone side, a plurality of enclosures containing circuit devices andmounted on the unflanged side of said panel, said de'mlces beingconnected with terminals projecting through said panel, a plurality oftube shelves mounted on the flanged side of said panel and extendinghorizontally therefrom, tube sockets mounted on said shelves,connections between said tube sockets and said terminals, all of saidconnections being arranged on the flanged side of said panel and withinsaid flanges, and a removable cover plate cooperating with the flangedside of said panel to form an enclosure, said plate providing for theapplication and removal thereof over said tube shelves.

3. In an amplifier, in combination, a vertical panel having flanges onone side, a plurality of enclosures containing circuit devices andmounted on the unflanged side of said panel, said devices beingconnected with terminals projecting through said panel, a plurality oftube shelves mounted on the flanged side of said panel and extendinghorizontally therefrom, each of said shelves comprising a flanged memberand cover cooperating to form an enclosure, said shelves having tubesockets, connections extending between said sockets and said terminals,said connections all being on the flanged side of said panel and withinthe flanges thereof, and a removable cover plate cooperating with theflanged side of said panel to form an enclosure, said cover plate havingopenings providing for the application and removal thereof over saidtube shelves.

RICHARD M. SOMERS.

